# OTP vs 99动态令牌

The clearest difference is in-app purchases: 99动态令牌 at none against OTP's 1. OTP's advantage is update cadence (every 6 months vs every 41 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. OTP sells 1 one-off in-app purchase. 99动态令牌 asks for nothing beyond the download.

OTP ships an update every 6 months, 99动态令牌 every 41 months. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | OTP | 99动态令牌 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (18 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 41 months |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 29 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [NetDragon Websoft Inc](https://appshunter.io/developer/327313781) |

## What reviewers say

### OTP

[App page](https://appshunter.io/ios/app/otp-auth/id1436497541)

This app generates secure one-time passwords for two-factor authentication on your device. It supports various protocols, allows easy account setup via QR codes or manual entry, and offers robust security features like biometric locks and encrypted backups.

**Highlights:** TOTP & HOTP code generation, QR code scanning for setup, Biometric app lock (Face ID/Touch ID), Encrypted data export/import, Account grouping and organization, Dark Mode support, iCloud sync and backup

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTPAuth Premium | $1.99 | one-time |


### 99动态令牌

[App page](https://appshunter.io/ios/app/99/id1487929226)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OTP free?

OTP is free to download, with in-app purchases available.

### Is 99动态令牌 free?

99动态令牌 is free to download, with no in-app purchases.

### Do OTP or 99动态令牌 have ads?

Neither OTP nor 99动态令牌 shows ads.

### Which is updated more often, OTP or 99动态令牌?

OTP ships an update every 6 months, and 99动态令牌 every 41 months. Most recently, OTP was updated on September 29, 2026 and 99动态令牌 on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*